Golf bag



FIG. 1 is a right side elevation view showing my new design for a golf bag;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a golf bag, as shown and described. 